Antivibration device for centrifugal governors.



N. H. HOLLAND. ANTIVIBRATION DEVICE FOR GENTRIFUGAL GOVERNORS.APPLICATION FILED 11110.17, 1012.

1,071,744. Patented Sept. 2,1913.

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NEWMAN I-I. HOLLAND, OF WEST ORANGE, NEW JERSEY, ASSIGNOR TO THOMAS A.EDISON, INCORPORATED, OF WEST ORANGE, NEW JERSEY, A CORPORATION OF NEWJERSEY.

Specification of Letters Patent.

. atented Sept. 2, 1913.

Application filed August 17, 1912. Serial No. 715,546.

To all who 11bit may concern Be it known that I, Nmvamn H. HOL- LAND, asubject of the King of Great Britain, and a resident of WVest Orange, inthe county of Essex and State of New Jersey, have invented certain newand useful Improve ments in Antivibration Devices for CentrifugalGovernors, of which the following is a description.

My invention relates to antivibration de vices for centrifugal governorsand more particularly to such a device as applied to governors of thetype in which a plurality of weighted spring arms are movable outwardlyunder the action of centrifugal force.

In all machines, especially in those providcd with motors, vibrationsare created by the operation of the machine. For example, in an Edisonbusiness phonograph, such vibrations originate mainly in the motor andare probably augmented by other parts of the phonograph, in theoperation thereof. \Vhen a centrifugal governor, especially one having aplurality of weights mounted on spring arms, is used on such a machinefor controlling its speed, or for other purposes, the governor is veryliable to partake of and amplify these vibrations. To obtain the bestworking conditions, it is, of course. dosirable in all machines, toeliminate 'vibra tions thereof .in so far as it is possible to do so,and especially this the case in an ap paratus such as a phonograph wherethe result thereof is in'lperfcct recording or reprodueing.

The objects of my invention are to prevent a governor from partaking ofand amplifying the vibrations of a machine to which it is applied and toprovide simple and efficient means for accomplishing this result.

In order that my invention may be more clearly understood, attention isdirected to the accompanying drawings forming a part of thisspecification, in which the same reference characters are used todesignate corresponding parts throughout, and in which:

Figure 1 is an elevation of a motor for a phonograph provided with acentrifugal speed governor having an anti-vibration device appliedthereto, in accordance with my invention. Fig. 2 is an end elevation ofthe governor with the anti-viln'ation device applied thereto, as shownin Fig. 1; and Fig. 3 is an enlarged cross sectional View on line a e ofFig. 1.

Referring to the drawings, reference character 1 represents a motor,which is here shown as an electric motor of the type usually employed in.lhlison business phonegraphs. The motor is suitably attached to thesupporting plate 2 and power may be taken from the shaft 3 thereof bymeans of pulley 't and belt 5. In order to control the speed of themotor 1, I provide brake mechanism comprising any suitable centrifugalgovernor 6 adapted to cooperate wit-h an adjustable brake arm 7 providedwith friction pads S. In the device shown in the drawing, the governor(3 comprises a shaft, forming an extension of the motor shaft 3, acollar 5) fixed to the shaft, a collar '10 loose on the shaft andcarrying the usual friction disk 11. adapted to cooperate with thefriction pads 8 of the brake arm 7, and a plurality of bowed spring arms12 connected to the collars 9 and 10 and weighted between their ends bymeans of weights 13. ,It will be obvious that the governor will tend topartake of and amplify any vibrations of the motor 1, and this tendencyis very pronounced in the specific form of governor herein illus trated,due to the employment of the weighted spring arms 12. In order toprevent this tendency of the governor as much as possible, I providesuitable means, such as an cmlless helical steel spring l4, for embracing the bowed spring arms 12, and which will remain in contacttherewith no matter what the relative posit-ions of the spring arms. itwill be apparent that any outward movement of any arm or arms 12 will beresisted by the spring l t, as such movement would expand the spring.Suit-- able means is provided for maintaining the helical spring i l. inproper position on the spring arms 12. This means, as shown, comprises apair of illll'lS 15, each of which is formed with otl'sct ends 16 and17, one end 16 being suitably secured to collar 9, as by a screw 18,which may also serve to attach one of the spring arms 12 to the collar,and the other end 17 of which contacts the spring 14.

Having now described my invention, what I claim as new therein anddesire to protect by Letters Patent is as follows 1. The combinationwith a centrifugal governor having a plurality of outwardly movableweighted arms, of means unattached to but embracing and contacting saidarms for preventing vibrations of the governor, substantially asdescribed.

2. The combination with a centrifugal governor having a plurality ofoutwardly movable weighted arms, of a spring unattached to but embracingand contacting said arms for preventing vibrations of the governor,substantially as described.

3. The combination with a centrifugal governor having a. plurality ofoutwardly movable weighted arms, of an endless helical spring unattachedto but surrounding and contacting said arms for preventing vibrations ofthe governor, substantially as described.

4. The combination with a centrifugal governor having a plurality ofoutwardly movable weighted arms, of an endless helical spring unattachedto but surrounding and contacting said arms, and means for maintainingthe spring in position on said arms, substantially as described.

5. The combination with a centrifugal governor having a plurality ofoutwardly movable Weighted spring arms, of an endless helical springunattached to but surrounding and contacting said spring arms forpreventing vibrations of the governor, substantially as described.

6. The combination with a centrifugal governor comprising a shaft, aloose collar and a fixed collar mounted thereon, a plurality of springarms connecting the collars, and weights carried by the spring armsintermediate their ends, of an endless helical spring surrounding andcontacting the spring arms between the weights and the nxed collar, andmeans attached to the fixed collar for retaining the endless spring inposition on the arms, substantially as described.

7. The combination with a centrifugal governor comprising a shaft, aloose collar and a fixed collar thereon, a plurality of bowed springarms connected at their opposite ends to the collars, and weightscarried by the spring arms intermediate their ends, of an endlesshelical spring surrounding and contacting the spring arms between theweights and the fixed collar, and a plurality of members secured to thefixed collar and engaging the endless spring to properly position thesame, substantially as described.

8. The combination with a centrifugal governor comprising a shaft, aloose collar and a fixed collar mounted thereon, and a plurality ofoutwardly movable weighted arms connecting said collars, of an endlessspring surrounding and contacting the weighted arms, and means attachedto one of said collars for retaining the endless spring in position onsaid arms, substantially as described.

This specification signed and witnessed this 16th day of August 1912.

NEWMAN H. HOLLAND.

Witnesses WVILLIAM A. HARDY, ANNA R. KLEHM.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

